diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
index 7789877..0306a13 100644
--- a/.github/workflows/main.yaml
+++ b/.github/workflows/main.yaml
@@ -11,11 +11,15 @@ on:
 jobs:
   test:
     runs-on: macos-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python_version: ["3.10", "3.12", "3.14"]
     steps:
       - uses: actions/checkout@v6
       - uses: actions/setup-python@v6
         with:
-            python-version: '3.10'
+            python-version: ${{ matrix.python_version }}
       - name: install in editable mode
         run: pip install -e '.[test]'
       - name: pytest
@@ -30,7 +34,7 @@ jobs:
 
       - uses: actions/setup-python@v6
         with:
-          python-version: "3.10"
+          python-version: "3.14"
 
       - name: Install pypa/build
         run: python -m pip install build --user
diff --git a/dev/environment-dev.yaml b/dev/environment-dev.yaml
index fd82d52..a34f895 100644
--- a/dev/environment-dev.yaml
+++ b/dev/environment-dev.yaml
@@ -2,7 +2,7 @@ name: app_pass
 channels:
   - conda-forge
 dependencies:
-  - python 3.10
+  - python 3.13
   - pre_commit
   - pytest
   - rich
diff --git a/pyproject.toml b/pyproject.toml
index cd41007..dc7c365 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "app_pass"
-version = "0.2.0"
+version = "0.2.1"
 authors = [
   {name = "Dominik Kutra", email = "dominik.kutra@embl.de"}
 ]
diff --git a/src/app_pass/__init__.py b/src/app_pass/__init__.py
index d3ec452..3ced358 100644
--- a/src/app_pass/__init__.py
+++ b/src/app_pass/__init__.py
@@ -1 +1 @@
-__version__ = "0.2.0"
+__version__ = "0.2.1"
diff --git a/src/app_pass/_macho.py b/src/app_pass/_macho.py
index 14dc7c7..1a9724e 100644
--- a/src/app_pass/_macho.py
+++ b/src/app_pass/_macho.py
@@ -88,7 +88,7 @@ def from_otool_output(otool_L_output):
         return MachOHeader(vals[0], FILETYPE.from_hex_str(vals[4]))
 
 
-@dataclass
+@dataclass(frozen=True)
 class Build:
     platform: str
     minos: str